package com.itheima.service;

import com.alibaba.dubbo.config.annotation.Reference;
import com.itheima.pojo.Menu;
import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import com.itheima.pojo.User;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import java.util.ArrayList;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;

@Component
public class SpringSecurityUserService implements UserDetailsService{
    //使用dubbo通过网络远程调用服务提供方获取数据库中的用户信息
    @Reference
    private UserService userService;

   //根据用户名查询数据获取用户信息
    @Override
    public UserDetails loadUserByUsername(String userName) throws UsernameNotFoundException {

        User user = userService.findByUserName(userName);
        if(user == null){
            //用户名不存在
            return null;
        }
        String station = user.getStation();
        if(Integer.parseInt(station) == 0){
            //被禁用
            return null;
        }
        //动态为当前用户授权
        List<GrantedAuthority> list = new ArrayList<>();
        //获取角色
        Set<Role> roles = user.getRoles();
        for (Role role : roles) {
            list.add(new SimpleGrantedAuthority(role.getKeyword()));
            //获取权限,为用户授权
            Set<Permission> permissions = role.getPermissions();
            for (Permission permission : permissions) {
                list.add(new SimpleGrantedAuthority(permission.getKeyword()));
            }
        }
        org.springframework.security.core.userdetails.User securityUser = new org.springframework.security.core.userdetails.User(userName,user.getPassword(),list);

        return securityUser;
    }
}
